[reopen] Scroll position in content

editor/src/main/java/io/github/rosemoe/sora/text/Content.java

@@ -60,6 +60,8 @@ public class Content implements CharSequence {
     private final ReadWriteLock lock;
     private int textLength;
     private int nestedBatchEdit;
+    private int scrollX;
+    private int scrollY;
     private final AtomicLong documentVersion = new AtomicLong(1L);
     private final Indexer indexer;
     private final ContentBidi bidi;
@@ -98,6 +100,8 @@ public Content(CharSequence src, boolean threadSafe) {
         }
         textLength = 0;
         nestedBatchEdit = 0;
+        scrollX = 0;
+        scrollY = 0;
         lines = new ArrayList<>(getInitialLineCapacity());
         lines.add(new ContentLine());
         contentListeners = new ArrayList<>();
@@ -1003,6 +1007,34 @@ public boolean isCursorCreated() {
         return cursor != null;
     }
 
+    /**
+     * Get horizontal scroll position of editor
+     */
+    public int getScrollX() {
+        return scrollX;
+    }
+
+    /**
+     * Get vertical scroll position of editor
+     */
+    public int getScrollY() {
+        return scrollY;
+    }
+
+    /**
+     * Set horizontal scroll position. This does not affect the editor.
+     */
+    public void setScrollX(int scrollX) {
+        this.scrollX = scrollX;
+    }
+
+    /**
+     * Set vertical scroll position. This does not affect the editor.
+     */
+    public void setScrollY(int scrollY) {
+        this.scrollY = scrollY;
+    }
+
     /**
      * Dispatch events to listener before replacement
      */

editor/src/main/java/io/github/rosemoe/sora/widget/CodeEditor.java

@@ -4845,6 +4845,13 @@ protected void onSizeChanged(int w, int h, int oldWidth, int oldHeight) {
         }
     }
 
+    @Override
+    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
+        super.onScrollChanged(l, t, oldl, oldt);
+        text.setScrollX(l);
+        text.setScrollY(t);
+    }
+
     @Override
     protected void onDetachedFromWindow() {
         super.onDetachedFromWindow();